On Thu, Aug 18, 2011 at 6:25 AM, Frederic Weisbecker <fweisbec@gmail.com> wrote:>>>> Why not do it unconditionally? That is, if all the conditions are>> fulfilled, disable the tick regardless of any cpuset settings.>> Because I'm not sure it's a win on every workload. This involves> some hooks here and there (syscall slow path), IPIs, etc...

I agree with Avi. I'd be inclined to investigate further to see ifthere are any important workloads on which it's not a win - and thenadd the extra complexity to control it from cpusets if necessary.Unless there's really a good reason to make it configurable, it'ssimpler to make it unconditional.